Electric-motor fan



(No Model.) ZSheets-Sheet I. J. D. BRINSER.-

ELECTRIC MOTOR FAN- Y No. 560,569.v Patented May 1'9, 1896.

' lll Ma? llllllilll WE l:

Mi Il l UNITED STATE-s PATENT Ormea.

JAMES D. BRINSER, OF LANCASTER, PENNSYLVANIA, ASSIGNOR, BY DIRECT ANDMESNE ASSIGNMENTS, TO THE MARlE'll'lA MANUI `ACTURIN(} COH- PANY, OFMARIETTA, PENNSYLVANIA.

ELECTRIC-MOTOR FAN.

SPECIFICATION forming part of Letters Patent No. 560,569, dated May 19,1896.

Application filed July 12,1894. Serial No, 517,268. (No model.)

To all wil/0m, it 77u02/ concern:

Be it known that 1, .Linus D. BRINSER, a citizen of the United States,residing at Lancaster, in the county of Lancaster and State ofPennsylvania, have invented certain new and useful Improvements inElectric-Motor Fans; and I do hereby declare the following to be a full,clear, and exact description of the invention, such as will enableothers skilled in the artto which it appertains to make and use thesame.

This invention relates to improvements in an electric-motor fan adaptedto be suspended from a ceiling or supported on the upper end of avertical column resting on a floor, and is of that class in whichhorizontal fan-blades have their shafts secured intospecially-constructed sockets placed in the periphery of anarmature-carrier rotating about a centrallylocated magnetic field knownto the trade as a field-magnet.

The objects of the invention will clearly appear in the followingdescription, and its elements will be distinctly set forth in theclaims.

The invention consists, first, in the special construction of thepole-pieces and coil-cores of the field-magnet; second, in the specialconstruction of the sockets receiving the ends of the shafts of thefan-blades; third, in the special construction of the bearing and sleeveof the armature-carrier7 and, fourth, in providing the motor-housing ofthe fan with electrolier-sockets, whereby incandescent lamps may besecured thereto for illuminating purposes.

The purposes of the invention are attained by the mechanism and devicesillustrated in the accompanying drawings, in which similar letters andfigures of reference designate like parts throughout the several views,and in which-- Figure l is a vertical section of a suspended fanembodying the elements of the invention, the upper-end of thesuspending-shaft being broken away and shown in separate views in n andet. Fig.. 2 is a plan of the polepieces detached from Fig. 1, partiallyin horizontal section, showing the supporting-yoke in full and dottedlines in place on the under side 5 Fig. 5, an enlarged section of aportion of the armature-carrier, taken on the line a: u in Fig. 1,viewed from the right, dotted lines showing the inclination of thefan-blades; Fig. (i, a similar view of the same portion completed; Fig.7, a top view of Fig. l completed, with the upper housing and fau-bladeportions removed; Fig. 8, a bottom view of the same with the parts belowthe line 'y 1 2/ in Fig. 1 removed, and Figs. 9 and 10 modifications ofthe upper and lower ends of Fig. 1 as they appear when the fan issecured to the top of a Hoor-column.

In the construction of the held-magnets of motors for electric fans ofthis class it has been the practice heretofore to make the polepieces ofcast and the cores of the coils of wrought iron and joining themtogether by butting the ends of the cores against the inner faces of thepole-pieces, securing them in position by means of screws or boltshaving their shafts passed through the bodies of the pole-pieces, theirinner ends tapped into the axes of the cores, and their headscountersunk or embedded into the outer faces of said polepieces. Tosecure great compactness of the magnetic field, simplicity of form,uniformity of metallic fiber or texture, continuity of lines ofconductivity without the many fractures, seams, or joints unavoidableheretofore, as well as to permit various coils to be readily applied tomeet the conditions of the different electric sources or plants inconnection with which said fans may be used, and to allow those burnedout to be replaced by new ones, the following construction is preferred:

The framework or base of the field-magnet here referred to is made of agood quality of Norway or Sweden iron forged in two pieces, and they areexact counterpart-s of each other, so as to be interchangeable. Theyconsist each of a pole-piece A and a coil-core A, integrally made orjoined at one end, and the cores have their forward or free ends a andu. slightly reduced in diameter and closely fitted into correspondingorifices in the other ends of the pole-pieces, which have their innerfaces resting against the small shoulders formed by said reduction, asat a and a'. (Best shown in Fig. 2.) The pole-pieces have each a centraleut-out a2 to reduce metal and IOO are provided in their upper and lowerfaces with screw-threaded orifices a3 to receive attaching or securingscrews, to be hereinafter described.

B designates the usual wire coils, which, for the purposes of thisinvention, are wound upon spools B', having non-magnetic ends l), ofanysuitable fibrous substance, secured to the ends of magnetic ferrulesb of light metallic tubing, adapted, closely fitting, to sleeve upon thecores A. A spool in dotted lines is shown in place on the upper core inFig. 9, and spools, with coils thereon, are shown in Figs. 1, 7, and S.

C designates a bar or yoke secured to the under faces of the pole-piecesby means of screws l, passed through its ends and into the orifices a3of said polepieces. Vertically through the center of the yoke is ascrewthreaded orifice c, surrounded on the under side by adownwardly-extendin g tubular projection C', having around its convexface a ring flange or shoulder cf to stop the upward movement of theworkin g parts placed below. This yoke serves to bind said pole-piecestogether, secure the coils in place, and complete the field-magnet, aswell as to support the revolving armature-carrier, its bearing, thebrush-holder yoke, an ornamental housing or cover, and an ornamentalpendant to finish the same.

To the top of the field-magnet, by means of screws 2, passed through itsbody and into the orifices CL3 in the upper faces of the polepieces, issecured a non-magnetic housing or covering D, having secured to itsouter edge by rivets or screws 3 a peripheral rim or flange D/ to coverthe revolving armature, yet to be described. This housing is providedwith binding-posts d, to which are secured the field-magnet wires, aswell as the wires from the electric source or plant, and to one of theseposts is secured a fuse-block d' to break the electric connection when asuddenly-increased voltage occurs, which block may be made the subjectof a separate patent in an application to be hereafter made, while intothe top center of the housing is secured the lower end of a rod or tubeD2, Fig. l, by means of which the fan is suspended from a ceiling by thebroken-away end and hook shown in Figs. 3 and 4.

Into the orifice c of the yoke is secured the upper end of a rod orshaft E, also screwthreaded at its lower end, and in the greater portionof its body, from the top, is formed a key-seat or groove e for the thepassage of the coil-wires to the cominutator-brushes. At prescribedpoints hardened-steel collars E and E2 are secured to the body of thisshaft to form vertical bearings against which the armature-carriersleeve rotates. Butting against the lower end of the collar E2, which isprolonged and slightly reduced circumferentially, as shown at e, is acollar or washer E3, having an upwardly-pro j ecting rim e2, forming anannular recess e3, provided with a V-grooved bottom, in which balls lroll to form a bearing for the revolving armaturecarrier. This collarrests on a washer E4, provided in its upper face with a radial groove inthe cut-away portion (not shown in the drawings) for the passage of thewires to and from the coils and connecting the brushes, as shown in Fig.1, while a j ain-nut E5, screwed onto the threaded lower end of theshaft, serves to bind these several parts together and hold themsecurely in place.

F designates a cylindrical sleeve or tube of approved dimensions,provided on its inner face with a tubular lining F', made of metaline orother approved substance, fitted closely above and below to the convexsurface of collarbearings E and E2, before mentioned, so as toconstitute the wearing or rubbing faces against said bearings, whilebelow and also within the tube F is a hardened-steel collar-ring F2 torotate on top of the balls et, likewise before mentioned. Integral withthe upper end of the tube F is an outwardly-extending ring-iiange f,provided with radiallyprojecting and upwardly-curving arms f', having attheir outer extremities a horizontal ring or flange f2, provided on itsouter edge with an upwardly and downwardly extending peripheral rim f3and supporting on its upper face, within said rim, the coil-sections 5of the revolving armature. (See Figs. l, 7, and S.) The tube or sleeve Fis also provided externally with a tubular body F3, into which areembedded the sections F4 of a cylindrical commutator, and the sectionsare held upwardly in place by a dovetailed ringwasher F5, aflixed to thelower edge thereof by screws G, tapped into said body, while a j ani-nutFG, screwed onto the lower end of the sleeve F, serves to secure thecommutator to said sleeve, and wires 7, stretched over beams f", securedto the arm ff, serve to connect the commutator-sections with thesections of the armature-ring.

To the under face of the ring f2, inside of the rim f3, radiallyextending and oppositely disposed, being rigidly secured to thearmature-carrier, are placed the fan-blade supporters G of theinvention. In the drawings they are shown to be integral with thecarrier, and they have partially-cylindrical bodies provided lengthwisewith axial bores g to rcceive the fan-blade shafts S. From above aretapped through said bodies screws g', having flattened ends or points g2within said bores to engage grooves or key-seats 9 in said shafts tokeep the shafts from turning, and below are lugs g3, through whichset-screws g4 serve to keep the shafts from slipping out. The grooves 9must be cut into the shafts, with reference to the blades theretoattached, in such a position as to give to said blades the desireddegree of inclination, which in the drawings is about thirty degreesfrom the horizontal. (See Figs. l, 5, G, and S.)

Onto the lower end of the shaft E is screwed the base or hub 7L of ayoke H, having oppo- IOO IIO

IZO

sitely-disposcd an d upwardly-extendin g arms 7L h' withhorizontally-disposed free ends h2 h2, to which are secured, below,bindingposts H H for the wires from the coils, and above, the bases ofcolumns H2 H2, having screwed through their upper endshorizontally-disposed tubes H3 H3, supporting in their axial borescommutator-brushes HL H4, and coiled springs H5 H5 behind the brushesserve to keep the forward end of said brushes in close contact with thecommutator, Figs. l and 8.

Onto the lower end 7b3 of the hub 71', which is prolonged and providedwith external screw-threads for this purpose, is screwed an ornamentalinverted cup or framework HG t0 serve as a housing to the lowermechanism of the fan, and the remaining threads serve to hold in placeany cap or cup HT as an ornamental pendant to finish this end of thefan.

The housing HG at any approved points is provided with ordinaryelectrolier-sockets, and their wires@ (shown in part in the drawings)are passed up through the groove c to above the coils B, where theirupper ends may be joined to the wires to and from the electric "source,or they may be carried up through the tube D2 and have said endsseparately connected with said electric source. In Fig. l a portion ofan incandescent-lamp globe is shown in place on the left and on theright a socket appears alone.

Removing the cap or cup H7 from the lower end, screwing it into the topof a column 10, Fig. 9, also removing the tube or shaft D2 from thecenter of the top housing and putting in place any ornamental iinial, asan acorn l1, Fig. lO, it becomes a column-fan; but in this case thewires from the electric source will pass upward within the shaft of thecolumn, Fig. 9, to the binding-posts, and

the groove e of the shaft E will have to be ex# tended the whole waythrough, as indicated by dotted lines el, Fig. l, for the passage ofsaid wires.

It will here be observed that instead of the rod or shaft E abovedescribed a tube may be used, when the groove or key-seat c may beomitted, for the wires may be passed through the bore of the tube. Thisconstruction does not involve any new invention and is so evident thatits separate illustration was deemed superfluous.

The invention having been thus fully described and the manner in whichit is performed distinctly set forth, what is considered new, anddesired to be secured by Letters Patent, is-

l. ln a field-magnet to be placed within the ring of the revolvingarmature of a motor for an electric fan, the herein-describedwroughtiron base comprising two oppositely-disposed pole-pieces and twoperpendicular]y-placed coil-cores between said pole-pieces; a polepieceand a coil-core integrally joined at one end, forged in one piece; eachcore having its diametrically-reduced forward end closely iitted intothe orifices in the orifice in the free end of thc opposite pole piece;the cores adapted to have spools with wire coils sleeved thereon, andmeans provided to hold the polepieces in position, substantially ashereinbefore set forth.

2. In a wrought-iron base of a held-magnet of the character described,the opposite polepieces A and A, and the coil-cores A' and A at rightangles therewith; a pole-piece and a core integrally joined at one end,having been forged in one piece; the diametrically-reduced forward endsof the cores iitt-ed into the orifices in the other ends of thepole-pieces, said ends resting againt the shoulders a and a of thecores; said cores adapted to receive and hold the coil-spools as shown;and means provided, such as the yoke-bar C having its extremitiessecured to the under faces of the pole-pieces to bind them together andhold them in position, substantially as set forth.

The combination in a field-magnet of a motor for an electric fan of thecharacter described, with the forged pole-pieces, A and A, and theforged coil-cores, A and A', each core having one end integrally joinedto one end of a pole-piece and the other end closely litted into theorice in the other end of the opposite p0le-piece, said end placedagainst the shoulder a' of the core, of the spools, B/ and B, providedwith the non-magnetic end disks, b and b, having their centers securedto the ends of the magnetic ferrules, b and b, sleeved upon the cores asshown; the magnetic iield-coils, B and B, wound upon said spools asshown and electrically connected with the brushes of a cylindricalcommutator and, through binding-posts CZ as shown, with an electricsource or plant; and, means provided, such as the yoke-bar C having itsends secured to the under sides ofthe pole-pieces to bind them togetherand to hold the rest of the mechanism in position, substantially as setforth.

4. The combination in an electric fan having a field-magnet, asdescribed, and the baryolre, O, with the central orifice, c, having itsextremities secured to the under faces of the pole-pieces of saidmagnet, with a shaft, E, provided with means for the passage of wiresalong its body, its upper end screw-threaded and secured into theorilice, c, of the yoke, and its lower end also screw-threaded, asshown; having the ring-bearings E' and E2, the washer E3 with theannular recess c3 having the V-grooved bottom and the balls et therein,the washer E", and the jam-nut E5, all secured to the body of the shaft,as shown, of the cylindrical sleeve, F, having the tubular lining, F',and the bearingain g, F2, within the sleeve, as shown; having meansprovided, at its upper end, to carrry the armature-rin g, and, on theouter face of its body, to support the cylindrical commutator; the wholesubstantially as described and for the purpose hereinbcfore set forth.

5. The combination in an electric fan having a rin garmature to revolveabout a central IOO IIO

field-magnet by means of a eylindrieal commutator mounted on thecarrier-sleeve rotating on a shaft havin g its upper end supported belowthe eenter of said held-magnet, with the peripheral ring-ilange of saidearrier, of the oppositely and radially disposed fan-blade supporters,G, seeured to the under faee of said flange; said supporters having thebladeshaft bores, g, at the axes thereof; the screws, ,cl/,with theflattened ends, gwithin the bores, tapped, downwardly extended, throughthe tops of the bodies of the supporters, and the set-screws, gli,upwardly extended, through the boss-lugs, g3, the whole adapted to holdthe fan-blades in lined position, all substantially as described, andfor the purpose set forth.

G. The combination in an eleetrie fan haying a revolvingarmature-Carrier, as shown, with the fan-blade supporters, G, secured tothe under side of said Carrier, as shown, the blade-shaft bores, g, inthe axes of the bodies of said carriers, the guide-pins, g2, in theupper portions of said bores, and the set-screws, g", through theirbottoms, of the blade-shafts, S, with the guide-grooves, 0, in theirtops, inserted into the bores, g, ot' the supporters, the grooves, 9, inengagement with the pins, g2, and the set-screws, g4, screwed home, andthe fan-blades, having the desired degree of inelination, seenred to theforward ends of said shafts, all substantially as described and for thepurpose hereinbefore set forth.

In testimony whereof I affix my signature in presence of two witnesses.

JAMES D. BRlNSER. XVituesses:

EDWIN BooKMYnn, EDWIN H. BooKMYnR.

